EP 1383311 A1 20040121 - Digital noise reduction techniques
Title (en)
Digital noise reduction techniques
Title (de)
Digitale Rauschverminderungstechniken
Title (fr)
Techniques numériques de réduction du bruit
Publication
Application
Priority
US 19647702 A 20020716
Abstract (en)
A preprocessor system (10) reduces random noise in video pixels by providing a memory (19) arranged to store first pixels processed during a first time period. A motion detector (300) responds to differences between the first pixels and second pixels processed during a second time period after the first time period to generate corrected motion signals. A first filter (100) generates first filtered values in response to the differences and the corrected motion signals. An impulse detector (244) generates control signals in response to detection of impulses, and an impulse reducer (250) generates second filtered pixel values in response to the first filtered values and the control signals. <IMAGE>
IPC 1-7
IPC 8 full level
H04N 5/21 (2006.01)
CPC (source: EP US)
H04N 5/21 (2013.01 - EP US)
Citation (search report)
- [XA] WO 0161993 A1 20010823 - UNIV BRITISH COLUMBIA [CA]
- [XA] DE 4409283 A1 19950921 - PHILIPS PATENTVERWALTUNG [DE]
- [A] DE 19636867 C1 19980102 - PHILIPS PATENTVERWALTUNG [DE]
- [A] US 5268760 A 19931207 - SUYAMA MASAKI [JP]
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 1383311 A1 20040121; EP 1383311 B1 20060830; DE 60307942 D1 20061012; DE 60307942 T2 20070906; US 2004012720 A1 20040122; US 7050501 B2 20060523
DOCDB simple family (application)
EP 03016128 A 20030716; DE 60307942 T 20030716; US 19647702 A 20020716